Title pretty much says it all. I'm able to reproduce this consistently on my machine.

I was doing a search for star wars in the bargains forum. As one might imagine, it brought up a lot of big threads. The only way to search within a thread to find those terms is to select the option to print the thread and then the option to show all of the posts on the same page. I click on the link to show them all, and it adds something that appears to be a session ID to the URL visible in the address bar, but I still only see the first page of posts.